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Question

Mathematics Question on Conditional Probability

An unbiased coin is tossed n times. The probability that head will present itself, odd number of times is

A

14\frac{1}{4}

B

13\frac{1}{3}

C

12\frac{1}{2}

D

15\frac{1}{5}

Answer

12\frac{1}{2}

Explanation

Solution

P(E)=2n−12n=12P(E) = \frac{2^{n -1}}{2^n} = \frac{1}{2}